Jigglypuff is a playable character in the Brawl mod Project M. It returns from Melee with a nearly identical moveset.

Jigglypuff is ranked 36th out of 41 on the officialtier list, in the midst of the D tier. This is an improvement over its Brawl placement, where it was 36th out of 38, but still a very significant drop from its Melee placement of 5th out of 26.

Seeing as how Jigglypuff was one of the worst characters in Brawl, it has been nearly fully returned to its Melee incarnation for its appearance in Project M. However, Jigglypuff's tournament success relative to the cast is still reminiscent of its significantly less viable Brawl appearance. Jigglypuff still boasts good matchups in theory against Melee's top tiers, such as Falco, Sheik, and Peach; however, the revamped Melee mid- and low-tiered characters and Brawl newcomers give it significant trouble. Many of them now have better disjoints, projectiles, and KO confirms, which makes it much harder and riskier for Jigglypuff to drift around opponents and intrude into their space as it could in Melee.

Jigglypuff is also held back by the new stage list. Project M introduces small, cramped tournament legal stages such as the revamped Green Hill Zone and Wario Land, which are huge detriments to Jigglypuff's survivability. Jigglypuff also still has problems fighting on Final Destination, and the low ceiling on the now-starter Pokémon Stadium 2 can work against it as well. With the increased number of stages, tournaments often allow two bans even in best of 5 sets, which means that Jigglypuff's opponents can ban its best stage in Melee, Dream Land, while the Jigglypuff player cannot ban all of its bad stages at the same time.

Overall, while Jigglypuff can still be a capable character in Project M, it is often considered bottom tier by the competitive community due to its difficulty in adapting to the new characters and stages.

Jigglypuff does a horizontal spinning kick. Has relatively short range. This move can be angled up or down.

Up tilt

9% (clean), 8% (late)

Jigglypuff leans forward and kicks up from behind with its right foot. Deals high knockback.

Down tilt

10%

Jigglypuff crouches low and sticks one foot forward.

Dash attack

12% (clean) 8% (late)

Jigglypuff dashes forward and headbutts the opponent. This move can be used for a DACUS.

Forward smash

17% (clean) 13% (late)

Jigglypuff lunges forward and delivers a front kick. Has good range but significant ending lag.

Up smash

14%

Jigglypuff headbutts the air, hitting opponent with great force. A smaller hitbox exists in Jigglypuff's head that deals 15% damage, but never actually connects due to being overlapped by the bigger hitbox.

Down smash

12%

Jigglypuff spins around, then does a split kick, hitting on both sides simultaneously. Both feet launches opponents at a semi-spike trajectory, making it a useful edgeguarding move. Both of Jigglypuff's feet are intangible while the hitboxes are out.

Jigglypuff drills down at the opponent, hitting multiple times. This move can be led into ground moves, or into a combo finisher with Rest. Similar to Samus's up tilt, this attack can only meteor smash grounded opponents, making it an unconventional meteor smash.

Grab

—

Pummel

3%

Slaps opponent with its tuft of hair. Fairly slow.

Forward throw

5% (hit 1), 7% (throw)

Jigglypuff puffs itself up to push its opponent away. Deals surprisingly high knockback compared to most throws.

Back throw

10%

Jigglypuff back suplexes the opponent.

Up throw

11%

Jigglypuff spins once and tosses opponent upwards. The strongest out of all of Jigglypuff's throw. Leads to a Rest on fast-falling opponents, which is the first step for the space animal slayer combo.

Down throw

1% (hits 1-4), 3% (hit 5), 2% (throw)

Jigglypuff grinds the opponent into the ground.

Floor attack (front)

8% (foot), 6% (body)

Spins one leg around while getting up, kicking behind then in front of itself.

Floor attack (back)

8% (foot), 6% (body)

Spins one leg around while getting up, kicking behind then in front of itself.

Floor attack (trip)

5% (hit 1), 3% (hit 2)

Spins on its head and kicks around itself.

Edge attack (fast)

7%

Jigglypuff flips up from the ledge with a kick.

Edge attack (slow)

8%

Jigglypuff slowly gets up and spins its body in a similar fashion to its down smash.

Jigglypuff rolls forward to attack. The move's power, range, and speed can be increased by charging it. When it is fully charged, Jigglypuff will say "Jiggly!" and briefly flash. The direction of the move can be changed by pressing the opposite direction on the control stick and hitting an opponent will cause Jigglypuff to rebound. This move can help with horizontal recovery, but will put Jigglypuff into a helpless state whenever the move ends in the air.

Jigglypuff punches forward, causing opponents to be launched upward. The move has short range but stay out for a long time, similar to a sex kick. The hitbox also deals strong shield damage. This move can be used to gain vertical and horizontal distance by tilting the control stick upward or downward respectively.

Jigglypuff plays its infamous song, causing any opponents nearby to fall asleep. The more damage the opponent has, the longer they stay asleep. The sing time can be cancelled if Jigglypuff grabs onto the ledge, with the opponent falling asleep (leaving them vulnerable), but that isn't effective due to the move's such low range.

Jigglypuff's most devastating attack. Jigglypuff dozes off, gaining a few frames of invincibility, before completely falling asleep. During the invincibility frames, any opponent making direct contact with Jigglypuff will receive extremely high flame damage and huge knockback, making the ping sound effect. This move can OHKO lighter opponents or larger opponents at close edges.

Jigglypuff rapidly swells up to a gargantuan size, barely being able to cover up all of Final Destination. During the inflation process, opponents are pushed off the stage. When Jigglypuff shouts "JIGGLY!!!", opponents are then completely pushed off the stage, sometimes leading to a OHKO. Touching Jigglypuff during deflation deals damage and high knockback.

Jigglypuff now gets back its yellow crown costume from Melee as another palette swap. It additionally has a new costume that gives it a more opaque color and fairy wings, which emit sparkles when moving in midair; this heavily references the fact that Jigglypuff has become part Fairy (type) in recent Pokémon games (more specifically the Generation VI games), which is a newly-introduced elemental type. PMDT had confirmed on their subreddit that Jigglypuff would have an additional alternate costume based off its headband costume in Melee in a future version of Project M. While it never made it into the mod officially, it was later released on the Brawl Vault.